2099797 has 6 divisors (see below), whose sum is σ = 2442678. Its totient is φ = 1799784.

The previous prime is 2099771. The next prime is 2099809. The reversal of 2099797 is 7979902.

It can be written as a sum of positive squares in only one way, i.e., 2099601 + 196 = 1449^2 + 14^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2099797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21378 + ... + 21475.

It is an arithmetic number, because the mean of its divisors is an integer number (407113).

2^2099797 is an apocalyptic number.

It is an amenable number.

2099797 is a deficient number, since it is larger than the sum of its proper divisors (342881).

2099797 is an equidigital number, since it uses as much as digits as its factorization.

2099797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42867 (or 42860 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 2099797 is about 1449.0676312719. The cubic root of 2099797 is about 128.0537900551.

The spelling of 2099797 in words is "two million, ninety-nine thousand, seven hundred ninety-seven".